Alclad

Alclad is a corrosion-resistant aluminium sheet formed from high-purity aluminium surface layers metallurgically bonded to high-strength aluminium alloy core material. These sheets are commonly used by the aircraft industry. The first aircraft to be constructed from Alclad was the all-metal Navy airship ZMC-2, constructed in 1927 at Naval Air Station Grosse Ile. Alclad is a trademark of Alcoa but the term is also used generically.